Lost Circulation Compositions Comprising Pumice and Associated Methods

Patent metadata

Field	Value
Publication number	US-2017036959-A1
Application number	US-201615332491-A
Country	US
Kind code	A1
Filing date	Oct 24, 2016
Priority date	Mar 9, 2012
Publication date	Feb 9, 2017
Grant date	—

Abstract

Disclosed are lost circulation treatment fluids and methods of sealing lost circulation zones. Embodiments include a lost circulation treatment fluid comprising pumice, hydrated lime, a set retarder, and water.

First claim

What is claimed is:

1 . A lost circulation treatment fluid comprising:
pumice, hydrated lime, a set retarder, and water.

2 . The lost circulation treatment fluid of claim 1 wherein the lost circulation treatment fluid has a shear-thinning index of less than 1 as calculated by the Herschel-Bulkley model.

3 . The lost circulation treatment fluid of claim 1 wherein the lost circulation treatment fluid further comprises aluminum sulfate.

4 . The lost circulation treatment fluid of claim 1 wherein the set retarder comprises at least one retarder selected from the group consisting of a phosphonic acid, a phosphonic acid derivative, a lignosulfonate, a salt, an organic acid, a carboxymethylated hydroxyethylated cellulose, a synthetic co- or ter-polymer comprising sulfonate and carboxylic acid groups, a borate compound, and any mixture thereof.

5 . The lost circulation treatment fluid of claim 1 wherein the lost circulation treatment fluid further comprises a dispersant selected from the group consisting of a sulfonated-formaldehyde-based dispersant, a polycarboxylated ether dispersant, and any combination thereof.

6 . The lost circulation treatment fluid of claim 1 wherein the set retarder comprises a phosphonic acid derivative, and wherein the set-delayed cement composition further comprises a polycarboxylated ether dispersant.

7 . The lost circulation treatment fluid of claim 1 wherein the lost circulation treatment fluid further comprises a cement set activator, and wherein the cement set activator comprises at least one cement set activator selected from the group consisting of calcium chloride, triethanolamine, sodium silicate, zinc formate, calcium acetate, sodium hydroxide, sodium sulfate, nanosilica, sodium hexametaphosphate, and any combinations thereof.

8 . The lost circulation treatment fluid of claim 1 wherein the lost circulation treatment fluid has a density in the range of from about 8 lb/gal to about 17 lb/gal.

9 . A lost circulation treatment fluid comprising:
pumice, hydrated lime, a set retarder, and water; wherein the lost circulation treatment fluid has a shear-thinning index of less than 1 as calculated by the Herschel-Bulkley model, wherein the lost circulation treatment fluid has a static gel strength of at least about 100 lb/100 ft 2 at a temperature of about 50° F. to about 200° F.

10 . The lost circulation treatment fluid of claim 9 wherein the lost circulation treatment fluid has a shear-thinning index of less than 1 as calculated by the Herschel-Bulkley model.

11 . The lost circulation treatment fluid of claim 9 further comprising aluminum sulfate.

12 . The lost circulation treatment fluid of claim 9 wherein the set retarder comprises at least one retarder selected from the group consisting of a phosphonic acid, a phosphonic acid derivative, a lignosulfonate, a salt, an organic acid, a carboxymethylated hydroxyethylated cellulose, a synthetic co- or ter-polymer comprising sulfonate and carboxylic acid groups, a borate compound, and any mixture thereof.

13 . The lost circulation treatment fluid of claim 9 further comprising a dispersant selected from the group consisting of a sulfonated-formaldehyde-based dispersant, a polycarboxylated ether dispersant, and any combination thereof.

14 . The lost circulation treatment fluid of claim 9 wherein the set retarder comprises a phosphonic acid derivative, and wherein the set-delayed cement composition further comprises a polycarboxylated ether dispersant.

15 . The lost circulation treatment fluid of claim 9 further comprising a cement set activator, and wherein the cement set activator comprises at least one cement set activator selected from the group consisting of calcium chloride, triethanolamine, sodium silicate, zinc formate, calcium acetate, sodium hydroxide, sodium sulfate, nanosilica, sodium hexametaphosphate, and any combinations thereof.

16 . The lost circulation treatment fluid of claim 9 wherein the lost circulation treatment fluid is a set-delayed cement composition capable of remaining in a pumpable fluid state for about 1 day or longer at a temperature of about 100° F.

17 . The lost circulation treatment fluid of claim 9 wherein the lost circulation treatment fluid has a static gel strength of at least about 500 lb/100 ft 2 at a temperature of about 50° F. to about 200° F.

18 . A lost circulation treatment system comprising:
a lost circulation treatment fluid comprising: pumice, hydrated lime, a set retarder, and water, wherein the lost circulation treatment fluid is a set-delayed cement composition capable of remaining in a pumpable fluid state for about 1 day or longer at a temperature of about 100° F.; and a cement set activator.

19 . The lost circulation treatment system of claim 18 wherein the lost circulation treatment fluid has a shear-thinning index of less than 1 as calculated by the Herschel-Bulkley model.

20 . The lost circulation treatment system of claim 18 wherein the lost circulation treatment fluid has a static gel strength of at least about 100 lb/100 ft 2 at a temperature of about 50° F. to about 200° F.

Assignees

• Halliburton Energy Services Inc

Inventors

• Iverson Benjamin John
• Pisklak Thomas Jason
• Morgan Ronnie Glen
• Agapiou Kyriacos
• Brothers Lance Everett

Classifications

• C09K8/467

  containing additives for specific purposes · CPC title

• C04B28/18

  containing mixtures of the silica-lime type · CPC title

• C04B2103/22

  Set retarders · CPC title

• E21B33/13

  Methods or devices for cementing, for plugging holes, crevices or the like · CPC title

• C04B40/0658

  Retarder inhibited mortars activated by the addition of accelerators or retarder-neutralising agents · CPC title